Hi guys. A newbie here. I have a generac 4456-3 installed in 2004 running on L.P. I have had a few problems over the years (rear cylinder not firing for a min. or two on startup,always shuts down 1n 15 seconds on startup but then restarts and runs fine (only in warmer temps.) backfire on startup which i can stop if i turn rear adjustment screw cw.(every 3 months it will start to backfire again and i have to turn screw cw some more. I have purchased a new regulator (0d8631) because i think all these problems are related to regulator. Any suggestions for pre-adjusting screws before i install.
Just a little update. All these problems went away when i installed a new regulator. I suspect selonoid was sticking or regulator seal on one side was sticking, or both.